3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $a = array('a'); $b = array('b'); var_dump($a + $b); $a = array('a' => 1); $b = array('b' => 2); var_dump($a + $b);
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
array(1) { [0]=> string(1) "a" } array(2) { ["a"]=> int(1) ["b"]=> int(2) }